python - join all threads after start_new_thread

Question

When using the thread library, Is there a way to join all threads that were created by start_new_threads ?

for example:

try:    
    import thread 
except ImportError:
    import _thread as thread #Py3K changed it.

for url in url_ip_hash.keys(): 
    thread.start_new_thread(check_url, (url,))

How can join all threads ?

Answer 1

Is there a reason you're using thread instead of the recommended Threading module? If not, you should rather use the threading.Thread objects which have a join method:

from threading import Thread


def check_url(url):
    # some code

threads = []
for url in url_ip_hash.keys():
    t = Thread(target=check_url, args=(url, ))
    t.start()
    threads.append(t)

# join all threads
for t in threads:
    t.join()